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Grokking the Coding Interview Patterns

Solution: Unique Number of Occurrences

Explore how to solve the problem of checking unique number of occurrences in an integer array by implementing hash maps and hash sets. Understand the algorithm's approach, time, and space complexity while practicing data structure concepts for coding interviews.

We'll cover the following...

Statement

Given an array of integers nums, return TRUE if each value in the array has a unique number of occurrences; otherwise, return FALSE.

Constraints:

  • 11<= nums.length <=10001000

  • −1000-1000 <= nums[i] <= 10001000

Solution

The algorithm checks if there is a unique number of occurrences ...